Skiin’s “smart underwear” is taking the wearables game to a whole new region, Mashable reports. The high-tech underthings, unveiled at this year’s International Consumer Electronics Show, have six sensors woven into the bras and undies that can track heart rate, temperature, pressure, motion, body fat and hydration levels.

Sure, $349 for eight pairs of thongs (available for preorder here) might sound like a bit of a splurge, but what’s more important than your health?